It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 516 264 is not a prime number.
For example, 516 264 can be divided by 2: 516 264 / 2 = 258 132.
For 516 264 to be a prime number, it would have been required that 516 264 has only two divisors, i.e., itself and 1.
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516 264 is an even number, because it is evenly divisible by 2: 516 264 / 2 = 258 132.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 516 264 is about 718.515.
Thus, the square root of 516 264 is not an integer, and therefore 516 264 is not a square number.
The square of a number (here 516 264) is the result of the product of this number (516 264) by itself (i.e., 516 264 × 516 264); the square of 516 264 is sometimes called "raising 516 264 to the power 2", or "516 264 squared".
The square of 516 264 is 266 528 517 696 because 516 264 × 516 264 = 516 2642 = 266 528 517 696.
As a consequence, 516 264 is the square root of 266 528 517 696.
The multiples of 516 264 are all integers evenly divisible by 516 264, that is all numbers such that the remainder of the division by 516 264 is zero. There are infinitely many multiples of 516 264. The smallest multiples of 516 264 are: